Microwave- and Ultrasound-Assisted Extraction of Cannabinoids and Terpenes from Cannabis Using Response Surface Methodology.

Limited studies have explored different extraction techniques that improve cannabis extraction with scale-up potential. Ultrasound-assisted and microwave-assisted extraction were evaluated to maximize the yield and concentration of cannabinoids and terpenes. A central composite rotatable design was used to optimize independent factors (sample-to-solvent ratio, extraction time, extraction temperature, and duty cycle). The optimal conditions for ultrasound- and microwave-assisted extraction were the sample-to-solvent ratios of 1:15 and 1:14.4, respectively, for 30 min at 60 °C. Ultrasound-assisted extraction yielded 14.4% and 14.2% more oil and terpenes, respectively, compared with microwave-assisted extracts. Ultrasound-assisted extraction increased cannabinoid concentration from 13.2−39.2%. Considering reference ground samples, tetrahydrocannabinolic acid increased from 17.9 (g 100 g dry matter−1) to 28.5 and 20 with extraction efficiencies of 159.2% and 111.4% for ultrasound-assisted and microwave-assisted extraction, respectively. Principal component analyses indicate that the first two principal components accounted for 96.6% of the total variance (PC1 = 93.2% and PC2 = 3.4%) for ultrasound-assisted extraction and 92.4% of the total variance (PC1 = 85.4% and PC2 = 7%) for microwave-assisted extraction. Sample-to-solvent ratios significantly (p < 0.05) influenced the secondary metabolite profiles and yields for ultrasound-assisted extracts, but not microwave-assisted extracts.

Mapping past human land use using archaeological data: A new classification for global land use synthesis and data harmonization.

In the 12,000 years preceding the Industrial Revolution, human activities led to significant changes in land cover, plant and animal distributions, surface hydrology, and biochemical cycles. Earth system models suggest that this anthropogenic land cover change influenced regional and global climate. However, the representation of past land use in earth system models is currently oversimplified. As a result, there are large uncertainties in the current understanding of the past and current state of the earth system. In order to improve representation of the variety and scale of impacts that past land use had on the earth system, a global effort is underway to aggregate and synthesize archaeological and historical evidence of land use systems. Here we present a simple, hierarchical classification of land use systems designed to be used with archaeological and historical data at a global scale and a schema of codes that identify land use practices common to a range of systems, both implemented in a geospatial database. The classification scheme and database resulted from an extensive process of consultation with researchers worldwide. Our scheme is designed to deliver consistent, empirically robust data for the improvement of land use models, while simultaneously allowing for a comparative, detailed mapping of land use relevant to the needs of historical scholars. To illustrate the benefits of the classification scheme and methods for mapping historical land use, we apply it to Mesopotamia and Arabia at 6 kya (c. 4000 BCE). The scheme will be used to describe land use by the Past Global Changes (PAGES) LandCover6k working group, an international project comprised of archaeologists, historians, geographers, paleoecologists, and modelers. Beyond this, the scheme has a wide utility for creating a common language between research and policy communities, linking archaeologists with climate modelers, biodiversity conservation workers and initiatives.

Massachusetts' Pediatric Palliative Care Network: successful implementation of a novel state-funded pediatric palliative care program.

BACKGROUND: U.S. children with life-limiting illness face barriers to accessing palliative care. In 2006, Massachusetts signed into law a statute providing for the creation and funding of the Pediatric Palliative Care Network (PPCN). This innovative, exclusively state-funded program provides comprehensive direct and consultative community-based pediatric palliative care services including: (1) pain and symptom management, (2) case management and assessment, (3) social services, counseling, and bereavement services, (4) volunteer support services, (5) respite services, and (6) complementary therapies. Provision of care is through a network of state-licensed hospice programs, and an array of professional and volunteer services. OBJECTIVE: To describe Massachusetts' experience in implementing a novel pediatric palliative care program. DESIGN: Enrollment and service trends were identified using Massachusetts Department of Public Health administrative data. Responses to a written family satisfaction survey provided to each family enrolled on PPCN are summarized. RESULTS: In fiscal year 2010, PPCN partnered with 11 hospice programs to provide services to 227 children with life-limiting illness. A total of $680,850 (86.7%) of state funding went to direct contract funds for hospices. Admitting diagnoses included cancer (30%), chromosomal abnormalities (17%), neurodegenerative disorders (15%), and other (38%). There were 11 deaths, 100% of which occurred in the family's requested location. Median length of stay on service prior to death was 233 days. Families most commonly implemented psychosocial and case management services, followed by complementary therapies, and volunteer services. CONCLUSIONS: Successful implementation of a statewide pediatric palliative care program as modeled in Massachusetts is highly feasible at relatively low cost.